This voltage protector is designed for automatic protection of home appliances against under-voltage, over-voltage, and power interruptions. If the supply voltage is too low or too high, it may affect normal operation, reduce appliance lifespan, or damage compressor motors in air conditioners, refrigerators, and freezers. Power outages followed by sudden restoration can create harmful voltage surges that may damage compressors. This device automatically disconnects the load and provides a delayed restart to protect compressor-based appliances.Applications: Plug the protector into a wall outlet, then connect appliances such as air conditioners, refrigerators, or freezers to the output socket. The unit can be mounted on a wall using the built-in hanging hole.Compatible devices include air conditioners, refrigerators, and freezers.Usage notes: Do not install in areas exposed to high temperature or moisture. Avoid using in dirty environments where plug oxidation may occur, as this could lead to premature failure.Specifications: - Input voltage: 220V, 50Hz or 110V, 60Hz - Voltage protection range: 90V3% to 130V3% (60Hz); 180V3% to 250V3% (50Hz) - Maximum current: 16A - Restart delay time: 180 seconds - LED or LCD display shows real-time voltage and operating status - Provides five protection modes: over-voltage, under-voltage, power interruption, surge/spike, and overload protection Product dimensions: 5.2 x 9 x 3.5 cmSuitable for use with TVs, LCD and plasma displays, DVD players, home theater systems, computers, laptops, washing machines, refrigerators, dryers, ovens, dishwashers, and other household appliances without compressors.